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On climate change

Coleman has called global warming "the greatest scam in history," in an article written for KUSI-TV. [3] He also accused The Weather Channel of "global warming alarmism," shortly after publicly breaking with them. [4]

In his 2008 Heartland conference speech, Coleman argued for "exposing what he called 'the fraud of global warming.' He advocated suing those who sell carbon credits, which would force global warming alarmists to give a more honest account of the policies they propose." [5] According to a critical account of his talk, "Coleman spewed the same tired diatribe, accusing Al Gore and carbon credit sellers of perpetrating mass 'financial fraud' and of burying a 'legitimate' debate." Coleman urged other skeptics to help him launch a lawsuit in order to expose "shady practices," saying "if the lawyers will take the case -- sue the people who sell carbon credits. That includes Al Gore. That lawsuit would get so much publicity, so much media attention. And as the experts went to the witness stand and testified, I feel like that could become the vehicle to finally put some light on the fraud of global warming." [4]

Coleman's critics counter that his allegations have little, if any, scientific basis. Coleman "claimed that average global temperatures had risen by 'maybe a tenth of a degree' over the last century; strange then that the IPCC (Intergovernmental Panel on Climate Change) reported in 2007 that temperatures actually increased by an average of 0.74°C over the same period." [4]

Coleman claims the dubious distinction of writing the first error in the book Climatism! by Steve Goreham.[6] On the front cover it notes foreword by John Coleman Meteorologist, although , as noted above John Coleman is not a meteorologist.